Bluestone of Stonehenge

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This is a sample of the rock used to make the monument Stonehenge in England.; This is a sample of Preseli Spotted Dolerite—a chemically altered igneous rock containing spots or clusters of plagioclase feldspar. It is a medium grained dark and heavy rock; harder than granite.; The bluestones at Stonehenge were placed there during the third phase of construction at Stonehenge around 2300 BC.; The majority of them are believed to have been brought from the Preseli Hills; about 250 miles away in Wales.
This is a sample of the rock used to make the monument Stonehenge in England.; This is a sample of Preseli Spotted Dolerite—a chemically altered igneous rock containing spots or clusters of plagioclase feldspar. It is a medium grained dark and heavy rock; harder than granite.; The bluestones at Stonehenge were placed there during the third phase of construction at Stonehenge around 2300 BC.; The majority of them are believed to have been brought from the Preseli Hills; about 250 miles...
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